Leiden
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Leiden Weather in September

September in Leiden typically sees daytime highs of 20°C (68°F) and nighttime lows of 13°C (55°F). Rainfall is also possible this month, so it's worth packing an umbrella. It falls within the summer season.

Rainfall in Leiden in September

Past climate data indicates that roughly 16 days will see rain, totalling around 92 mm (3.6 in) for the month. Rain this month is fairly typical, a standard mix of wet and dry days with no particularly heavy or persistent showers.

Temperature in Leiden in September

Leiden in September is worth a visit. The temperature is excellent, with 20°C (68°F) during the day and 13°C (55°F) at night. September is part of summer. Conditions are often most pleasant around the middle of the day. At 13°C (55°F) overnight, it can feel quite a bit cooler after dark. Worth packing something warmer for evenings, but the cooler temperatures are ideal for sleeping.

Sunshine in Leiden in September

The month experiences a moderate amount of sunlight, with 144 hours of sunshine. This provides a nice balance between sunshine and clouds.

Wind Speed in Leiden in September

Wind speeds average 5 m/s (10 knots) during September. At this speed, gentle to moderate breezes make small trees sway and the wind creates whitecaps on water bodies. Daily variations range from moderate winds to stronger breezes, creating excellent conditions for sailing, kite flying and wind sports.

If your ideal day consists of dry skies and pleasant temperatures, June, July, August and September typically offer the best circumstances for Leiden.

Leiden Temperature in September

Min Temperature
13°C (55°F)
Max Temperature
20°C (68°F)
Chance of Rain
52%
Precipitation
92 mm (3.6 in)
Rainy days
16 days
Humidity
82% *
Windspeed
5 m/s (10 knots) *
Sunshine
144 hours *
Percentage Sunshine
37% *
* Data from: Valkenburg, the Netherlands (5 KM, 3 Miles).

Leiden Weather by Month

Pick a month to see the average temperature, rainfall and sunshine in Leiden - and find the best time to visit.

Daily Historical Temperatures

50-year average (1976-2025)

Based on our historical records, temperatures in Leiden typically stay consistent throughout September, with daily highs averaging around 20°C (68°F). Nights are cool, with lows typically ranging from 10°C (50°F) to 13°C (55°F).

Average temperatures in September

Daily Historical Precipitation

50-year average (1976-2025)

Average daily rainfall for each day of the month based on long-term records.

Average precipitation in September

Historical weather records for Leiden in September

Browse day-by-day weather records for Leiden spanning 51 years. Select any month and year to see actual temperatures, rainfall, and conditions recorded on each day.

Leiden historical weather extremes in September

Our historical data for Leiden spans 1976 to 2026, revealing these weather extremes.

  • The warmest day in September was on September 13, 2016, with a maximum of 31°C (88°F).
  • The coldest September day was on September 22, 1996, with a maximum of 11°C (52°F).
  • The lowest overnight temperature recorded in September was 2°C (36°F) (September 29, 1979).

Best Places in the Netherlands in September

Find out more about the weather in the Netherlands and which places have the best travel conditions in this month. See all of the Netherlands in September →

perfect weather
pleasant
tolerable
unpleasant
poor

Perfect weather is subjective. On this map perfect weather has been defined with temperatures between 20°C (68°F) and 29°C (84°F) and not too much precipitation (less than 90 mm (3.5 in) a month).

What to Wear in Leiden in September

Comfortable temperatures call for an easy wardrobe in September. Pack summer basics like t-shirts and shorts, but include a light jacket for cooler moments. A pair of comfortable walking shoes is essential. Expect heavy rainfall, so bring good rain protection and waterproof bags. It won't hurt to bring your sunglasses along, as you'll see some sunny periods.

What To Do in Leiden in September

We rated the following activities from 1 (least suitable) to 10 (best) to do.

  • Swimming
    6/10
  • Cycling
    9/10
  • Walking
    9/10
  • Camping
    8/10
  • Outdoor sports
    9/10

Leiden 3-Day Forecast

Popular in September

Where to go in September - average daytime high across popular destinations.

Bucket list

Need travel inspiration? Check out our bucket list articles and be inspired.